Window-screen



(No Model.)

W. W. COLE.

WINDOW SGREEN. 7 No. 517,602. Patented Apr. 3,1894

4o v cidentally displaced. I have also simplified UNITED STATES PATENT OFFICE.

WARREN W. COLE, OF PORTLAND, MAINE.

WINDOW-SCREEN.

SPECIFICATION forming-part Of Letters Patent No. 517,602, dated April 3, 1894.

' Application filedjbecernber 30, 1893- Serial No. 495,202. (No model.)

1'0 whom it may concern:

Be it known that I, WARREN W. COLE, a citizen of the United States, residing at Portland, 1n the county of Cumberland and State of Mame, have invented certain new and useful Improvements in Window-Screens; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My lnventionrelates to window screens and particularly to a device for retaining such screens in place in the casing.

The invention is designed to be applied to the side barsof those Window screens which are grooved and held in place-in the casing by means of tongues secured to the casing or it may be used where the screen has tongues which fit into grooves in the casing.

Previous to my invention friction plugs were mounted ln'the side bars of such window screens as I have described, and were pressed outward against the casing by coiled in its retracted position by means of a perforated plate which engaged a notch in the side of the spindle by which the plug was 30,

withdrawn.

In operating the device described, it was found to be an easy matter to accidentally release the spindle from engagement with its plate when the screen was being adjusted by striking the spindle and causing the notch to slip off the edge of the'plate. In my present invention I have sought to improve on this device by'a construction which'will admit of the locking of the spindle in its retracted position in such amanner that it cannot be acthe construction. of the screen and made use of a semi-elliptical spring in the place of ,the coiled spring heretofore used.

' In the accompanying drawings I have illustrated my invention as applied to a screen havingagroove fitting a tongue in the casing.

In the drawings Figure 1 is a front view with'a portion in section. Fig. 2 is a section on the line new of Fig. 1'. Fig. 3 is an enlarged section on the line 2 2 of Fig. 2. Fig;

4. is a section on the line y y of Fig. 3. Fig. 5 is a view of the retaining plate. A B represents the window casing'and b an b are tongues secured thereto. The screen frame A is provided with grooves in its side bars adapted to fit said tongues. The tongue I) as here shown is made narrower than the tongue I) and the groove which fits the tongue I) has a corresponding depth. 'The tongue I) and its corresponding groove are sufliciently deep 'so that when the screen is pressed against the casing on that side the opposite side will come free from the tongue 12 and the screen may thus be taken out and put in in a manner which is well known.

My retaining device is applied to the side bar in one side and serves to force the screen against the casing on the opposite side. It

consists of a semi-elliptical spring 0 arranged with its central portion projecting outward and pressing against the groove 1) when in its normal or operative position. A spindle D is pivoted to the middle'of the springC and it.

has formed on its outer end a head 02 The inner end of the spindle is preferably provided with a handle at by which it may be withdrawn and the spring released from contact with the tongue b.

Means are provided for securing the spindle in itsretracted position when it is desired to removethe screen. For this purpose I make use of a perforated plate 6 through which the spindle passes and the inner end of the spindle is provided with an enlarge-- ment or projection 11. As herein shown, the body of the spindle is round and. the projection d is in the form of a flange or web which projects out at each side of the spindle forming a shoulder in such a position that it will rest against the plate e when the spindle is retracted. An opening 6 is formed in the plate suitable in size and shape to allow the spindle to pass when it is in its normal position but when retracted and turned from its normal position it stops it from passing and thus looks it securely in place. The opening e, as here shown, is the exact form of the cross section of the inner end of the spindle so that it is only necessary to pull in place. It will readily be seen that when the spindle is withdrawn and looked as herein described it cannot get accidentally unlocked but must be turned by hand to its normal position before it will release the 5 spring and allow it to act against the casing.

I claim-- The herein described device for retaining window screens in place consisting of a spindle extending laterally through the side bar,

10 a semi-elliptical spring for forcing said spindle outward against the casing, the outer end of said spindle being pivoted to said spring and the inner end of said spindle having a lateral projection, a retaining plate secured WARREN W. COLE.

Witn esses:

S. W. BATES, E. DUDLEY FREEMAN. 

